Paper joining machine



June 27, 1967 J. A. HARROD 3,327,595

PAPER JOINING MACHINE Filed Jan. 14, 1965 5 Sheets-Sheet l A A INVENTOR48 w 50 57 l'fizmz'e Qifarrod BY PM W ATTOFNE'K June 27, 1967 J. A.HARROD 3,327,595

PAPER JOINING MACHINE Filed Jan. 14, 1965 5 Sheets-Sheet 2 INVENTOR-J'z'mmzle QHZzrrod ATTOFNEK June 27, 1967 J. A. HARROD 3,327,595

PAPER JOINING MACHINE Filed Jan. 14, 1965 5 Sheets-Sheet 3 INVENTOR.Jimmzie CZJZEzrroQ' ATTOPNEY United States Patent 3,327,595 PAPERJOINING MACHINE Jimmie A. Harrod, Middleport, N.Y., assignor to Paperyelder, Inc., Medina, N.Y., a corporation of New ork Filed Jan. 14.1965, Ser. No. 425,392 11 Claims. (Cl. 93-1.1)

The present invention relates to an improved machine of the type whichis utilised for joining a plurality of sheets of paper together by asqueezing action between a pair of opposed dies.

It is one object of the present invention to provide an improved machinefor joining a plurality of sheets of paper together which is automaticin a sense that the mere starting of the machine by the pressing of asuitable control will cause the machine to provide a complete cycle ofoperation and then automatically stop in condition to receive anotherstack of sheets.

Another object of the present invention is to provide an improvedmachine for joining a stack of sheets of paper together by the action ofopposed dies which is highly efficient in that it possesses a pluralityof uniquely associated linkages which provide a force multiplying effectand therefore permit the electric motor which drives the pair of opposeddies to be relatively small.

A further object of the present invention is to provide an improvedmachine for joining a plurality of stacked sheets of paper togetherwhich is capable of operating efficiently on either a relatively fewsheets or relatively many sheets by virtue of a simple adjustment whichsets the machine up for optimum operation under all circumstances. Otherobjects and attendant advantages of the present invention will readilybe perceived hereafter.

The present invention relates to an improved machine for joining aplurality of sheets of paper to each other by forcing portions of saidsheets into interlocking relationship by the action of opposed dies. Ahousing containing a motor therein is provided with a suitable controlarrangement for actuating the motor to cause it to start and stay inoperation until after a paper joining action has been completed. Themotor is coupled to a gear reducer which in turn has an output shaftmounting a first cam which drives a cam follower mounted on the pivotalconnection between the two links of a toggle linkage having a first endthereof affixed to the housing of the machine. As the cam rotates thetoggle linkage will tend to straighten and cause a first-class lever topivot by virtue of having one of the links of the toggle linkageattached thereto. A die is effectively mounted on the opposite end ofthe first-class lever from the toggle linkage and this die moves intomating engagement with a die mounted on an anvil on the machine tothereby press select portions of a plurality of superimposed sheets ofpaper together and thereby effect a joining operation. The motor willcontinue to operate until such time as the movable die returns to itsoriginal position and will thereafter automatically stop. Because of theplacing of the toggle linkage and the third-class lever in series, arelatively large/ multiplying effect is obtained so that a relativelysmall motor can be utilized to provide suflicient force to effect properpaper joining. Furthermore, the toggle linkage has an adjustmentassociated therewith to vary the amount which the toggle linkstraightens and therefore vary the length of travel of the movable dieto thereby adjust the machine for optimum operation on differentthicknesses of paper in an extremely simple and convenient manner. Thepresent invention will be more fully understood when the followingportions of the specification are read in conjunction with theaccompanying drawings wherein:

FIGURE 1 is a side elevational view of the improved machine of thepresent invention;

FIGURE 2 is a view partially in cross section taken substantially alongline 2-2 of FIGURE 1;

FIGURE 3 is a schematic wiring diagram showing the manner in which thecontrol arrangement for the automatic paper joining machine operates;

FIGURE 4 is a cross sectional view showing the relationship between themotor output shaft and the linkage which drives the movable die, thisview being taken substantially along line 4-4 of FIGURE 2;

FIGURE 5 is a view partially in cross section taken along line 5-5 ofFIGURE 4;

FIGURE 6 is a detail view partially in cross section taken substantiallyalong line 66 of FIGURE 4;

FIGURE 7 is a view similar to FIGURE 4 but showing the orientationbetween the various linkages when the toggle linkage is in its moststraight position whereas FIGURE 4 showed the toggle linkage in its mostbent position;

FIGURE 8 is a view taken substantially along line 88 of FIGURE 4;

FIGURE 9 is a fragmentary enlarged view showing the relationship betweenthe movable and stationary dies; and

FIGURE 10 is a schematic view showing the movable and stationary dies inposition joining a plurality of sheets of paper located therebetween.

The improved paper joining machine 16 of the present invention includesa base 11 having a peripheral upstanding rim 12 for receiving spacedscrews 13 which secure cover 14 to said base 11. A fiat headed screw 15(FIG- URE 4) extends upwardly through bottom of base 11 and is receivedin mating tapped aperture 16 which is located in base 17 of linkagehousing 18 for the purpose of securing said linkage housing to said base11.

An electric motor 19 is provided having gear reducer 20 coupled theretowith an output shaft 21 extending from the gear reducer into linkagehousing 18, and journalled in bearings 21' and 22" of the latter. A leg22 (FIGURE 2) extends from the bottom of gear reducer 20 and rests onbase 11 and is secured thereto by nut and bolt 23. Gear reducer 20 isattached to linkage housing E18 by screw 29 (FIG. 8) and other screws(not shown) extending between housing 18 and gear reducer 19. Screw 16and nut and bolt 23 firmly secure the motor 19 and the attached gearreducer 20 and linkage housing 18 to base 11.

When it is desired to join a plurality of sheets of paper 22 (FIGURE 10)together it is merely necessary to place them on anvil 24 between lowerdie 26 and upper die 27. An inclined feeding edge 25 leading to anvil24'- facilitates the insertion of the sheets between the dies. Lower die26 is held on anvil 24 by clamp 28 which is secured to the anvil proper29 by screws 30 (FIGURE 7). To determine the length of paper which canbe inserted into slot 31 between dies 26 and 27, an adjustable paperstop 32 is provided which is secured to linkage housing 18 by screw 33.A tab 34 extends laterally from stop 32 (FIGURE 2) and has a slot 35therein (FIGURE 1) which permits guide 32 to be moved from right to leftwithin the limits of slot 31 to thereby provide the desired positioningof guide 32.

Once the plurality of sheets of paper have been positioned between dies26 and 27 in the above described manner, the machine is actuated toprovide an automatic cycle of operation wherein upper die 27 will becaused to move downwardly into joining engagement with lower die 26while sheets of paper 22 are located therebetween to thereby cause thecorrugating action of dies 26 and 27 to join the sheets of papertogether and thereafter die 27 will automatically return to a stoppedposition which is remote from die 26 to permit the joined stack ofpapers to be withdrawn and another stack of papers to be inserted. a

In order to initiate the joining operation, a starting lever 36(FIGURE 1) is provided outside of main housing 14 and this lever ismounted on shaft 37 (FIGURES 1, 2, 4 and 6). The inner end of shaft 37mounts an arm 38 which. is rotated when switch arm 36 is rotated. Switcharm 36 is rotated in a clockwise direction in FIGURE 1 by depressing tabportion 38' thereof. The foregoing pivotal action of switch arm 36 iseffected against the bias of the spring 39 affixed between pin 40extending from shaft 37 and pin 41 extending from linkage housing 18.Arm 38, upon being pivoted, will engage switch arm 42 of switch 43secured to boss 44 extending from side 45 of housing 18 and cause saidswitch arm 42 to complete a circuit which initiates operation ofelectric motor 19.

' As can be seen from FIGURE 3, upon movement of arm 38, switch arm 42carrying contact 46 thereon will move into engagement with contact 47 tothereby cause a circuit to be completed from L-1 through lead 48, fuse49, lead 50, lead 51, contact 47, contact 46in engagement therewith,switch arm portion 52, lead 53, motor armature 54, lead 55, arm 56,contact 57, contact 58, lead 59, lead 60, field winding 61, and lead 62back to the electric current source L-2.

As soon as rotation of motor 19 is initiated by completion of theforegoing circuit, shaft 21 will rotate in a counterclockwise direction(in the direction of the arrow) in FIGURE 4 and cause rounded camsurface 63 of cam 64, which is mounted on shaft 21, to move intoengagement with switch arm 42 to thereby maintain the foregoing circuit.The circuit is maintained notwithstanding that starting lever 36.hasbeen released and arm 38 no longer depresses arm 42 (FIGURE 4). Therotation of shaft 21 in a counterclockwise direction will continue allthe while that rounded carn surface 63 of cam 64 maintains switch arm 42in a position where contact 46 (FIG- URE 3) thereon is in engagementwith contact 47.

In addition to cam 64, a cam 65 is also keyed to shaft 21 and this camhas an outer surface 66 which is in engagement with cam follower 67(FIGURES 4, 7) which is mounted on pin 68 joining links 69 and 70,which, in combination, form a toggle linkage. More specifically in theforegoing respect, the lower end of link 69 is pivotally mounted onshaft 71 having its outer ends 72 and 73 (FIGURE 6) journalled in walls74 and 75, respectively, of linkage housing 18 (FIGURE 6). As cam 66rotates in a counterclockwise direction with shaft 21, cam follower 67will move from the position shown in FIG- URE 4 to the position shown inFIGURE 7 when the high point 76 of cam 65 is in engagement with camfollower 67. Because the lower end of link 69 is aflixed to housing 18,the upper link 70 will assume a more vertical position shown in FIGURE7, or in other words, the toggle links 69, 70 will straighten out underthe action of cam 65. In so doing, the upper end 77 of link 76 will risefrom the position shown in FIGURE 4 to the position shown in FIGURE 7and carry the left end 78 of firstclass lever 79 upwardly because of thepin 8 coupling link 70 to lever 79. In other words, lever 79 will becaused to pivot in a clockwise direction about pin 81 mounted betweenwalls 74 and 75 of housing 18. Wall 74 is part of a dished member andwall 75 is essentially a cover which is secured thereto by screws, notnumbered. The pivotal movement of lever 79 is effected against the biasof spring 82 located between top wall 83 of housing 18 and the left sideof lever 79.

The upward movement of the portion of lever 79 to the left of pin 81 inFIGURE 4 will be accompanied by a corresponding downward movement by aportion of lever 79 to the right of pin 81. This portion has a pin 84extending through it for joining elongated link 85 to the right end oflever 79. As elongated link moves downwardly with the right end of lever79, die 27 which is affixed to the lower end of link 85 will movedownwardly toward die 26 mounted in the anvil 24 of the machine. At thispoint it is to be noted that die 27 is held in the bifurcated lower endof link 85 by screw 86, and that link 85 is guided for vertical movementby side portions 85' and 85" of housing 18.

It will be appreciated that when the high point 76 of cam 65 is inengagement with toggle roller 67, die 27 will reach bottom dead-centerand sheets of paper 22 will be joined by the action of dies 26. and 27.As cam 65 continues its counterclockwise rotation, cam follower roller67 will move onto cam portion 87 and will move to the right in FIGURES 4and 7 because at this time spring 82 will be permitted to expand. Thus,upper die 27 will move upwardly away from lower die 26 as link 85 movesupwardly in response to the counterclockwise rotation of lever 79 aboutpin 81.

It will be noted at this time that the toggle linkage 69-70 inconjunction with the first-class lever 79 having an extremely long armto theleft of pin 81 and an extremely short arm to the right of pin 81provides an extremely high force-multiplying arrangement to cause anyforce produced as a result of output motor 19 to be realized in agreatly magnified quantity at die 27, thereby permitting a relativelysmall motor 19 to be utilized. Furthermore, an inspection of FIGURES 5and 6 indicates that inwardly extending portions of the opposite sidesof the housing are provided to prevent links 69 and 70 from tiltinglaterally.

The rotation of cam 63 will continue in a counterclockwise directionafter toggle linkage 69-70 starts to fold from its straightened positionshown in FIGURE 7 toward its bent position shown in FIGURE 4 until suchtime as the flat portion 88 (FIGURE 7) of cam 63 reaches switch arm 42,at which time contacts 46 and 47 (FIG. 3) will separate and contact 46will move into engagement with contact 90.

As noted above, it is cam 64 (FIG. 6) which actuates arm 42 of switch43. However, it can be seen from FIG- URE 8 that a switch 91, mounted onboss 91' by screws 92', has a switch arm 92 for engagement by thesurface of cam 65. Only the high point 76 of cam 65 will move switch arm92 sufficiently to actuate switch 91. However, this engagement is noteffected until after cam surface 63 loses engagement with switch arm 42of switch 43,'as will become apparent hereafter.

After contacts 46 and 47 of switch 43 separate and before high point 76of cam 65 engages switch arm 92 of switch 91, the circuit will remain inthe condition shown in FIGURE 3 where there is no completion of saidcircuit, and therefore motor 19 will coast in view of the momentumachieved by it while it was energized. Its momentum will carry it untilthe point is reached where high point 76 of cam 65 engages switch arm 92and causes contact 57, controlled by switch arm 92, to move intoengagement with contact 93 (FIG. 3).

The circuit through motor 19 will therefore be reversed in that flow ofcurrent will be from L1 through lead 48, fuse 49, lead 50, lead 94, nowclosed contacts 93 and 57, switch arm portion 56, lead 55, armature 54,lead 53, switch arm portion 52, now closed contacts 46 and 90, lead 95,lead 60, field winding 61 and lead 62 to L2. It can thus be seen thatthe flow of current through motor 19 is reversed in direction relativeto the flow therethrough when the motor is operating as a result of theactuation of switch 43 by cam surface 63. This reversal is necessary tostop motor 19 in its desired position because its high torque wouldcarry it beyond its position if such reversal were not relied on.

The reversal of flow of current through motor 19 by virtue of thecompletion of the above described circuit will provide a braking actionwhich will slow the motor down and reverse it to overcome its momentumin the opposite direction. However, switch arm 92 will be engaged byhigh point 76 of cam 65 only momentarily and after a very slightmovement of motor 19 in reverse, which causes shaft 21 to move in aclockwise direction in FIG- URE 4, switch actuating contact between highpoint 76 of cam 65 and switch arm 92 will be lost. At this time camsurface 63 will also not be in engagement with switch arm 42 of switch43 and switches 43 and 91 will assume their positions shown in FIGURE 3where flow of current through the armature 54 and field winding 61 isterminated. The motor 19 will therefore stop. Of course it will beappreciated that at this time the upper die 27 will be in its topdead-center position to permit a stack of joined papers to be removedfrom between dies 26 and 27 and a new stack to be placed between thedies 26 and 27. Upon the pivoting of starting lever 36 in a clockwisedirection in FIGURE 1, the above described sequence of operation willagain be initiated to cause die 27 to move downwardly into engagementwith die 26 to join the plurality of sheets of paper therebetween.

In accordance with the present invention, a unique arrangement isprovided for adjusting the pressure with which upper die 27 moves intoengagement with lower die 26. This arrangement is best shown in FIGURES1, 2, 4, 5 and 6. More specifically, a knob 96 extends outwardly ofhousing 14 and is attached to a keyed portion of shaft 71 by screw 97(FIGURE 6). It can be seen from FIGURE 6 that the ends 72 and 73 ofshaft 71 are concentric and are journalled in opposite sides 74 and 75,respectively, of housing 18. However, the central portion 97 of shaft 71is eccentric with respect to end portions 72 and 73.

Therefore the rotation of shaft 71 by the manipulation of knob 96 willresult in the raising or lowering of the central portion 97 of shaft 71(FIGURE 4). It will be appreciated, therefore, that the lower thecentral portion 97 of shaft 71 is when in its adjusted position, thelower will be end 78 of lever 79 when the toggle linkage 6970 is in itsstraightened position, and therefore movable die 27 will be further fromstationary die 26 than if portion 97 of shaft 71 were in its highestposition. The purpose of the foregoing adjustment is to adjust thepressure which movable die 27 will exert on stationary die 26 and foradjusting die 27 relative to die 26 for joining different thicknesses ofpaper. The shaft 71 is retained in its adjusted position by a frictionfit between collar 71 pressing on the inside of wall 75 and shoulder 96'pressing on the outside of said wall.

While the illustrated embodiment has been described in conjunction withan electrical circuit which is initiated by the actuation of lever 36 inthe above described manner, it will be readily appreciated that asuitable trigger may be located proximate guide 32 for actuation by thepaper when fully inserted between dies 26 and 27.

It can thus be seen that the improved paper joining machine of thepresent invention is manifestly capable of achieving the aboveenumeratedobjects, and while preferred embodiments of the present invention havebeen disclosed, it will be appreciated that it is not limited theretobut may be otherwise embodied within the scope of the following claims.

I claim:

1. A machine for joining a plurality of stacked sheets of papercomprising a housing, motor means in said housing, a cam driven by saidmotor means, a toggle linkage comprising first and second elongatedlinks each having first and second ends, a first pivotal connection forattaching a first end of said first link to said housing, a secondpivotal connection joining said second end of said first link to a firstend of said second link, a cam follower operatively mounted on saidsecond pivotal connection for engagement with said cam, a first classlever having first and second ends, a third pivotal connection couplingsaid second end of said second link to said first end of said lever,pivot means intermediate said first and second ends of said lever forpivotally mounting said lever on said housing, a third elongated link, afourth pivotal connection coupling said second end of said lever to saidthird elongated link, a first die mounted on said housing, and a seconddie mounted in opposition to said first die on said second end of saidthird elongated link, and switch means for energizing said motor meansto cause said cam to tend to straighten said toggle linkage and effectpivotal movement of said lever to thereby cause said second die to moveinto mating engagement with said first die to thereby join a pluralityof sheets of paper placed therebetween.

2. A machine as set forth in claim 1 wherein the distance between saidthird pivotal connection and said pivot means is greater than thedistance between said pivot means and said fourth pivotal connection.

3. A machine as set forth in claim 1 including circuit means for causingsaid motor to cause said second die to move from a position remote fromsaid first die to a position wherein it effects the joining of saidsheets of paper and thence to a position remote from said first die andthereafter causes said motor to automatically stop.

4. A device as set forth in claim 3 wherein said circuit includes secondswitch means actuated by said motor for maintaining a circuit to themotor operative unit said second die reaches its remote position.

5. A circuit as set forth in claim 4 including means for effectingreversal of said motor at approximately said remote position of said dieto thereby stop said motor substantially instantaneously and thus insuresufiicient spacing between said dies to permit paper to be placedtherebetween.

6. A machine for joining a plurality of stacked sheets of papercomprising a base, a first die mounted on said base, motor means mountedon said base, a gear reducer coupled to said motor means, an outputshaft associated with said gear reducer, a link mounted on said "basefor movement toward and away from said first die, a second die carriedby said link for movement into operative engagement with said first dieto thereby press a plurality of sheets of paper lying therebetween intojoined engagement, force multiplying linkage means operatively couplingsaid elongated link and said shaft, means for selectively energizingsaid motor to drive said elongated link, circuit means for causing saidmotor means to rotate in a first direction after said energization ofsaid motor means to thereby cause said second die to move from aposition remote from said first die to a position in engagement withsaid first die and thereafter to a position proximate said remoteposition, and means associated with said circuit means for terminatingenergization in said first direction and for causing said motor means tomomentarily rotate in a second direction which is opposite to said firstdirection to thereby provide a braking action, said momentary rotationin said second direction causing said second die to stop in said remoteposition.

7. A machine for joining a plurality of stacked sheets of papercomprising a base, a housing mounted on said base, motor means mountedon said base, a gear reducer coupled to said motor means, an outputshaft forming a part of said gear reducer, first and second cams mountedon said shaft, a toggle linkage comprising first and second elongatedlinks each having first and second ends, a first pivotal connection forattaching a first end of said first link to said housing, a secondpivotal connection joining said second end of said first link to a firstend of said second link, a cam follower operatively mounted on saidsecond pivotal connection for engagement with said first cam, a firstclass lever having first and second ends, a third pivotal connectioncoupling said second end of said second link to said first end of saidlever, pivot means intermediate said first and said second ends of saidlever for pivotally mounting said lever on said hous ing, a thirdelongated link, a fourth pivotal connection coupling said second end ofsaid lever to said third elongated link, a first die mounted on saidbase, a second die mounted in opposition to said first die on saidsecond end of said third elongated link, first switch means forenergizing said motor means to cause said shaft to rotate and therebycause said first cam to tend to straighten said toggle linkage andeffect pivotal movement of said lever to thereby cause said second dieto move into paper joining engagement with said first die to therebyjoin said plurality of stacked sheets of paper placed therebetween,first switch means mounted on said housing for engagement by said secondcam after rotation of said shaft has been initiated to thereby maintainsaid motor means energized for a predetermined amount of rotation ofsaid shaft and thereafter to permit said motor means to becomedeenergized, and second switch means mounted on said housing forengagement by said first cam after said motor means becomes deenergizedto thereby reverse the direction of rotation of said motor to therebyprovide an instantaneous braking action when said second die is at aposition remote from said first die, said reversal of the direction ofrotation causing said shaft to move said first and said second cams to aposition where they are out of actuating engagement with said second andfirst switch means, respectively, to thereby cause said second die tostop in a position remote from said first die to permit the placement ofa plurality of stacked sheets therebetween for a subsequent joiningaction.

8. A machine for joining a plurality of stacked sheets of papercomprising a base, a housing mounted on said base, motor means mountedon said base, a first die mounted on said base, a second die mounted onsaid housing, linkage means mounted on said housing and joining saidmotor means to said second die to thereby cause said second die to movetoward said first die to join said plurality of sheets and control meansfor selectively energizing said motor to move said second die towardsaid first die from a position remote from said first die to therebyefiect a joining action of said stacked sheets and to automaticallycause said second die to return to said position remote from said firstdie comprising means for energizing said motor means in a firstdirection to drive said second die from said remote position to saidposition wherein said plurality of sheets are joined and thereaftercontinue driving said second die until it reaches a position proximatesaid remote position, and means for momentarily reversing the directionof rotation of said motor when said second die is proximate said remoteposition to provide an instantaneous braking action and thereafterentirely terminate rotation of said motor when said second die reachessaid remote position.

9. A machine for joining a plurality of stacked sheets of papercomprising a base, a housing mounted on said base, motor means mountedon said base, a gear reducer coupled under said motor means, an outputshaft associted with said gear reducer, a first die mounted on saidbase, a second die, linkage means mounted on said housing foreffectively coupling said shaft to said second die to thereby cause saidmotor means to drive said second die toward and away from said firstdie, cam means mounted on said output shaft, first switch means actuatedby said cam means for driving said motor means in a first direction tothereby cause said linkage means to move said second die from a positionremote from said first die to a position wherein it etfects said joiningengagement and thereafter moves said second die to a position proximatesaid remote position, and second switch means actuated by said cam meansfor reversing said motor when said second die approaches said remoteposition to thereby provide an instantaneous braking action, said cammeans including means for causing said first and second switch means tobe deactuated when said second die reaches said remote position tothereby cause said motor to cease rotating when said second die is insaid remote position to thereby cause said second die to be spaced fromsaid first die an amount which is sufiicient to permit the insertion ofa stack of papers therebetween.

10. A machine for joining a plurality of stacked sheets of paper as setforth in claim 9 wherein said cam means includes first and second camsand wherein said first switch means is actuated by said first cam andsaid second switch means is actuated by said second cam, and

third switch means for manually effectively actuating said first switchmeans to initiate rotation of said motor means until said second cammeans engages said second switch means to maintain said motor rotatingin said first direction notwithstanding the subsequent deactuation ofsaid third switch means which initially caused said motor to rotate.

11. A machine for joining a plurality of stacked sheets of papercomprising a base, a first die mounted on said base, motor means mountedon said base, a second die, linkage means operatively coupling saidmotor means to said second die for movement toward and away from saidfirst die to thereby effect a joining of said stacked sheetstherebetween, and control meansfor initiating operation of said motormeans and effecting rotation thereof in a first direction to drive saidsecond die from a position remote from said first die to a positionproximate said first die to join said plurality of stacked sheets whilesaid motor means rotates insaid first direction, second means fordeenergizing said motor means after said joining of said sheets has beenelfect'ed to thereby cause said motor means to coast under its ownmomentum, and third means for momentarily energizing said motor in asecond direction which is opposite to said first direction when saidsecond die is proximate said remote position to thereby effect asubstantially instantaneous braking action, and means for terminatingsaid rotation of said motor in said second direction while said motorremains deenergized from rotating in said first direction, to therebycause said second die to stop in said remote position.

References Cited UNITED STATES PATENTS 2,155,629 4/1939 Zaveruka 83524 X2,275,111 3/1942 Noll 93-l.'l 2,678,589 5/1954 Pollard et a1 931.1 X2,851,888 9/1958 Scholin 83630 X FOREIGN PATENTS 411,041 3/1925 Germany.270,404 1/ 1930 Italy.

WILLIAM' W. DYER, 1a., Primary Examiner.

JAMES M. MEISTER, Examiner.

1. A MACHINE FOR JOINING A PLURALITY OF STACKED SHEETS OF PAPERCOMPRISING A HOUSING, MOTOR MEANS IN SAID HOUSING, A CAM DRIVEN BY SAIDMOTOR MEANS, A TOGGLE LINKAGE COMPRISING FIRST AND SECOND ELONGATEDLINKS EACH HAVING FIRST AND SECOND ENDS, A FIRST PIVOTAL CONNECTION FORATTACHING A FIRST END OF SAID FIRST LINK TO SAID HOUSING, A SECONDPIVOTAL CONNECTION JOINING SAID SECOND END OF SAID FIRST LINK TO A FIRSTEND OF SAID SECOND LINK, A CAM FOLLOWER OPERATIVELY MOUNTED ON SAIDSECOND PIVOTAL CONNECTION FOR ENGAGEMENT WITH SAID CAM, A FIRST CLASSLEVER HAVING FIRST AND SECOND ENDS, A THIRD PIVOTAL CONNECTION COUPLINGSAID SECOND END OF SAID SECOND LINK TO SAID FIRST END OF SAID LEVER,PIVOT MEANS INTERMEDIATE SAID FIRST AND SECOND ENDS OF SAID LEVER FORPIVOTALLY MOUNTING SAID LEVER ON SAID HOUSING, A THIRD ELONGATED LINK, AFOURTH PIVOTAL CONNECTION COUPLING SAID SECOND END OF SAID LEVER TO SAIDTHIRD ELONGATED LINK, A FIRST DIE MOUNTED ON SAID HOUSING, AND A SECONDDIE MOUNTED IN OPPOSITION TO SAID FIRST DIE ON SAID SECOND END OF SAIDTHIRD ELONGATED LINK, AND SWITCH MEANS FOR ENERGIZING SAID MOTOR MEANSTO CAUSE SAID CAM TO TEND TO STRAIGHTEN SAID TOGGLE LINKAGE AND EFFECTPIVOTAL MOVEMENT OF SAID LEVER TO THERBY CAUSE SAID SECOND DIE TO MOVEINTO MATING ENGAGEMENT WITH SAID FIRST DIE TO THEREBY JOIN A PLURALITYOF SHEETS OF PAPER PLACED THEREBETWEEN.